The present document is a technical report for 3DL Inter-band Carrier Aggregation under Rel-13 time frame. The purpose is to gather the relevant background information and studies in order to address 3DL Inter-band Carrier Aggregation requirements. The present document covers relevant background information and studies in order to address 3DL Inter-band Carrier Aggregation requirements for the Rel-13 band combinations in Table 1-1, Table 1-2 and Table 1-3.

The present document also covers the 4DL fallback modes for the 4DL Carrier Aggregation combinations with single UL configuration. These 4DL/1UL combinations are listed in Table 1-2.

The present document also covers the 5DL fallback modes for the 5DL Carrier Aggregation combinations with single UL configuration. These 5DL/1UL combinations are listed in Table 1-3.

  The present document contains a general part and band specific combination part. The actual requirements are added to the corresponding technical specifications.